epq課程對申請真的有用嗎？Alevel加分的高人氣選項
近幾年，隨著英本申請越來越“卷”，很多學生除了鉚足勁提升學術成績，還把目光轉向了學術背景的提升。于是，EPQ項目就成為了家長和學生眼中的“最優選項”。epq課程對申請真的有用嗎？一起來看看吧。 以往，一部分同...
Edexcel A Level Chemistry:復習筆記3.3.5 Saturation Test
Saturation Test Halogens can be used to test if a molecule is?unsaturated?(i.e. contains a double bond) Br2(aq) is an orange or yellow solution, called?bromine water?and this is the halogen ...
Edexcel A Level Chemistry:復習筆記3.3.4 Electrophilic Addition Mechanism
Electrophilic Addition Mechanism Electrophilic addition of hydrogen halides Hydrogen halides such as hydrogen bromide (HBr) are polar as the hydrogen and halogen atoms have different electro...
Edexcel A Level Chemistry:復習筆記3.3.3 Electrophilic Addition
Electrophilic Addition The double bond in alkenes is an area of high electron density (there are four electrons found in this double bond) This makes the double bond susceptible to attack by...
Edexcel A Level Chemistry:復習筆記3.3.2 Bonding in Alkenes
Bonding in Alkenes Each carbon atom has four electrons in its outer shell (electronic configuration: 1s22s22p2) Carbon atoms share these four electrons in four covalent bonds with other atom...
Edexcel A Level Chemistry:復習筆記3.3.1 Describing Alkenes
Describing Alkenes All alkenes contain a?double carbon bond, which is shown as two lines between two of the carbon atoms i.e. C=C All alkenes contain a double carbon bond, which is the funct...
Edexcel A Level Chemistry:復習筆記3.2.5 Free Radicals
Free Radical Substitution of Alkanes Alkanes can undergo?free-radical substitution?in which a hydrogen atom gets?substituted?by a halogen (chlorine / bromine) Since alkanes are very unreacti...
Edexcel A Level Chemistry:復習筆記3.2.4 Reducing Pollution
Catalytic Converters To reduce the amount of pollutants released in car exhaust fumes, many cars are now fitted with?catalytic converters Precious metals (such as platinum) are coated on a h...
Edexcel A Level Chemistry:復習筆記3.2.3 Pollution from Combustion
Causes & Effects of Pollution Alkanes are?combusted?(burnt) on a large scale for their use as fuels Complete combustion When alkanes are burnt in?excess?(plenty of) oxygen,?complete comb...
